<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{margin: 0;padding: 0;}
        .nuw {
            width: 100%;
            height: 100px;
            background:#00c3ea;
            border-top:1px solid;
        }
        .nuw_ad{
            width: 1000px;
            height: 40px;
            background: #f76e01;
            margin:30px auto;
        }
    </style>
</head>
<body>
<div class="nuw">
    <div class="nuw_ad"></div>
</div>
</body>
</html>